How far is Townsend, MT from Boise, ID?
The driving distance from Townsend, MT to Boise, ID is about 508.7 miles (818.6 km), with a travel time of about 08h 51m by car.
- The straight-line flight distance is about 295.5 miles (475.5 km).
- For a round trip, plan for roughly 17h 43m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 7:30 AM MDT.
Reverse, save, or send this route
This drive is better planned with a longer stop or an overnight stay. Copy the route link, send it to another device, or print a clean version before you head out.
This drive is better planned with a longer stop or an overnight stay.
Flight Distance
Driving Distance
Gas Cost Calculator
Leave and Arrive Planner
Pick a departure time to see your estimated arrival and same-day return window.
Drive time stays fixed at 08h 51m.
Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
You are leaving earlier than the recommended window, which gives you extra margin for breaks and traffic.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
City in Bingham County, Idaho, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Areas Of Smoke then Sunny
Sunny then Patchy Smoke
Driving Route Map
The map below follows the saved road route between Townsend and Boise.
Turn-by-Turn Driving Directions
Step-by-step road directions between Townsend and Boise.
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1
Start on the route
34 m · 13 sec
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2
Turn left onto South Front Street
2.9 mi · 4 min · South Front Street
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3
Continue straight
2.3 mi · 2 min
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4
Continue straight
1.2 mi · 1 min
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5
Continue straight
1.4 mi · 2 min
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6
Continue straight
68.5 mi · 1 hr 16 min
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7
At the end of the road, turn left
40.4 mi · 45 min
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8
Turn right
8.6 mi · 13 min
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9
Continue straight
9.1 mi · 12 min
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10
At the end of the road, turn right onto Idaho Medal of Honor Highway
58 mi · 1 hr 8 min · Idaho Medal of Honor Highway
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11
Continue on Yellowstone Highway
17.2 mi · 18 min · Yellowstone Highway
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12
Continue on Idaho Medal of Honor Highway
15.4 mi · 16 min · Idaho Medal of Honor Highway
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13
Continue on Rigby Highway
3.1 mi · 4 min · Rigby Highway
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14
Merge slight right onto Grandview Drive
575 ft · 14 sec · Grandview Drive
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15
Take the exit slight right toward I 15 South: Arco, Pocatello
1466 ft · 37 sec
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16
Merge slight left onto Veterans Memorial Highway
46.5 mi · 44 min · Veterans Memorial Highway
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17
Take the exit slight right toward I 86 West: Chubbuck, Twin Falls
1 km · 44 sec
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18
Continue straight
62.7 mi · 59 min
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19
Continue on Vietnam Veterans Memorial Highway
166.5 mi · 2 hr 36 min · Vietnam Veterans Memorial Highway
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20
Take the exit slight right toward US 20, US 26: Broadway Avenue
1402 ft · 34 sec · Idaho Medal of Honor Highway
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21
Keep slight right to continue on Idaho Medal of Honor Highway
134 m · 13 sec · Idaho Medal of Honor Highway
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22
Turn right onto South Broadway Avenue
2.9 mi · 6 min · South Broadway Avenue
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23
Turn left onto East Front Street
1 km · 2 min · East Front Street
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24
Turn right
17 m · 4 sec
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25
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Townsend and Boise.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
Vietnam Veterans Memorial Highway
Continue on Vietnam Veterans Memorial Highway
166 mi · 02h 36m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
Better with a longer stop
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
Areas Of Smoke then Sunny leaving Townsend and Sunny then Patchy Smoke near Boise.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Townsend to Boise?
The road trip is about 508.7 miles (818.6 km) and usually takes 08h 51m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
What is the halfway point on this route?
Blackfoot is a useful midpoint, sitting about 254.1 miles from Townsend and 254.6 miles from Boise.
How much longer is the road route than the straight-line distance?
The direct path is about 295.5 miles (475.5 km), while the road route adds roughly 213.2 extra miles because roads do not follow the straight air line.
When is the best time to leave for this route?
A good departure window is usually 6:00 AM to 7:30 AM MDT. Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $69.88 one way or $139.76 round trip. Estimated CO2 is about 159.5 kg one way.
What should you check before leaving?
Before you leave, expect Areas Of Smoke then Sunny around Townsend and Sunny then Patchy Smoke near Boise.
Flight Path Map
This map shows the direct air route between Townsend and Boise. Straight-line distance: 295.46 mi (475.49 km).
#1 Townsend
City in Montana, USA
| Population | 2,220 |
| Coordinates | 46.3191000, -111.5208000 |
| Altitude | 1171 |
| Country | United States |
#2 Boise
The capital of Idaho.
| Population | 228,959 |
| Coordinates | 43.6135000, -116.2034500 |
| Altitude | 823 |
| Country | United States |
End: Boise (-116.20345, 43.6135)
Estimated Travel Time
Distance: 819 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 16h 56m |
| 40 mph (64.37 km/h) | 12h 43m |
| 50 mph (80.47 km/h) | 10h 10m |
| 60 mph (96.56 km/h) | 08h 28m |
| 70 mph (112.65 km/h) | 07h 16m |
| 80 mph (129 km/h) | 06h 20m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $69.88 | $139.76 |
| Mid-grade | $4.23 | $75.95 | $151.89 |
| Premium | $4.55 | $81.65 | $163.31 |
| Diesel | $5.41 | $97.15 | $194.29 |
Assumes 8.3 L/100 km (about 28.3 MPG). CO2 is an estimate and varies by vehicle, fuel blend, traffic, and terrain.
Prices in Montana · Aug 11, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.